Internal Revenue Service officials say audits of taxpayers making $100,000 or more rose 14% last year from 2006. Recent IRS data also show a 29% increase in audits of people making $200,000 or more -- and an 84% surge in audits of those with incomes of $1 million or more.
Overall, the number of individual income-tax audits reached a 10-year high in 2007 -- and the IRS plans to increase the number of audits this year.
IRS research indicates much of the tax-noncompliance is committed by self-employed workers, such as consultants and small-business owners, whose taxes aren't withheld from their pay and whose income isn't reported separately to the government. By contrast, compliance is much higher among people whose pay is reported by their employers and whose taxes are withheld from their pay.
This year, "we will continue to focus on audits of high-income individuals," Linda Stiff, the IRS's acting commissioner, said in an interview. She also says IRS agents are intensifying their focus on "abusive" tax shelters, loosely defined as transactions with no real business purpose other than to avoid taxes. While the IRS has been waging war on shelters for years, officials see continued problems. "They tend to morph from year to year," Ms. Stiff says. "They shut down in one area and turn up somewhere else."
In addition, agents have increased audits of taxpayers involved in partnerships and businesses organized as "S corporations." With a typical S corporation, income isn't taxed at the corporate level. Instead, profits and losses flow through to shareholders, who are supposed to pay taxes at their own individual rates.
For the vast majority of taxpayers, the odds of getting audited remain quite low. Only about 1% of all individual income-tax returns filed in each of the past few years have been audited. But the chances of attracting the IRS's attention now are significantly higher than they were just a few years ago.
In fiscal 2007, the IRS examined a total of nearly 1.4 million individual income-tax returns. That's up 7% from the prior year and the highest number since 1997. By contrast, the IRS audited only 617,765 returns in fiscal 2000. The IRS's "coverage" rate -- audits divided by total number of returns filed the previous year -- has also been rising in recent years. For fiscal 2007, it stood at 1.03%, up from 0.98% the prior year and 0.49% in 2000. Even so, it's lower than where it was as recently as 1997.
IRS coverage rates are rising especially rapidly for higher-income taxpayers:
The IRS relies on numerous techniques to choose which returns are audited. Many returns are selected on the basis of a secret computerized-scoring system that the IRS recently has updated, which is based on a continuing research project involving in-depth audits of thousands of returns. Computer programs assign each tax return a score that evaluates the potential for inaccuracies, based on the IRS's experience with similar returns. IRS staffers then pore through those returns with the highest scores to see which would make the best targets.
Many returns are picked because of "mismatches" -- which means that something a taxpayer reported doesn't match what was reported separately to the IRS by employers, banks or other financial institutions. Thus, one way to reduce your chances of hearing from the IRS is to double-check your return to see if what you reported matches what appears on those forms.
Some returns get selected because of a tip from confidential informants, such as former business partners, ex-spouses or an angry neighbor. Separately, thousands of audit victims are picked at random among various income groups.
Most IRS probes are conducted by mail and are known as "correspondence" audits. These focus on a limited number of specific issues on a return and are designed to address those topics that don't require a full-scale, face-to-face audit. More complex issues are handled through what are known as "field" audits and are conducted in person. These may involve a trip to an IRS office or to the taxpayer's home or business.
In fiscal 2007, just over one million of the 1,384,563 individual income-tax audits were correspondence audits. Of the 31,382 audits of people with income of $1 million and higher, 19,123 were correspondence audits and 12,259 were field audits.